fix: (W-003) use Java mkdirs() for cross-engine compatibility in adapter tests

DirectoryCreate(path, true) is Lucee-only — Adobe CF only accepts 1 parameter.
Replace with Java File.mkdirs() which works on all CFML engines.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: bpamiri

packages/legacyadapter/tests/LegacyAdapterSpec.cfc

@@ -339,7 +339,7 @@ component extends="wheels.WheelsTest" output="false" {
 		/* Write content to a temp file, scan it, return first finding */
 		var tempBase = GetTempDirectory() & "wheels-legacy-test-#CreateUUID()#";
 		var tempDir = tempBase & "/" & arguments.subDir;
-		DirectoryCreate(tempDir, true);
+		CreateObject("java", "java.io.File").init(tempDir).mkdirs();
 		var tempFile = tempDir & "/test.cfm";
 		FileWrite(tempFile, arguments.content);